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Continuous testing method for platinum and palladium in ore

A measurement method and ore technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, etc., can solve the problems of unsuitable batch sample determination, extraction agent volatilization, human hazards, etc. problem, to achieve the effect of eliminating the interference of a small amount of iron, wide acidity range, and easy to grasp

Inactive Publication Date: 2017-06-13
有研科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to complete two extraction processes for the determination of platinum and palladium in each sample, the steps are cumbersome, and it is not suitable for the determination of batch samples; in addition, the colored complexes are extracted into the petroleum ether-chloroform organic phase system , a large amount of extractant will volatilize during the determination, and the toxicity is relatively high, which will cause harm to the human body

Method used

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  • Continuous testing method for platinum and palladium in ore
  • Continuous testing method for platinum and palladium in ore

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Accurately weigh 23.5698g of sample 1# into a porcelain boat, place the porcelain boat in a muffle furnace, heat up to 750°C, burn for 4 hours, transfer the sample into a 250mL beaker after cooling, add 30mL of concentrated hydrochloric acid, 5mL of hydrogen peroxide ( Concentration is 30%), heated and melted on electric furnace for 30 minutes. Add water to dilute to 100mL, boil on an electric stove, cool to 40-50°C, filter with Buchner funnel equipped with activated carbon adsorption column, wash with dilute hydrochloric acid with a concentration of 0.24mol / L, and then wash with water. The activated carbon column was taken out, placed in a porcelain crucible, put into a muffle furnace, and fired at 750°C for 3 hours. After taking out and cooling, moisten the residue with a small amount of water, add 4mL of aqua regia, dissolve on an electric furnace at 150°C, transfer the solution into a beaker, add 2 drops of saturated sodium chloride solution, evaporate to nearly dry...

Embodiment 2

[0035]Accurately weigh 20.0560g of sample 2# into a porcelain boat, place the porcelain boat in a muffle furnace, heat up to 730°C, burn for 3 hours, transfer the sample into a 250mL beaker after cooling, add 40mL of concentrated hydrochloric acid, 7mL of hydrogen peroxide ( Concentration is 30%), heated and melted on electric furnace for 30 minutes. Add water to dilute to 100mL, boil on an electric stove, cool to 40-50°C, filter with Buchner funnel equipped with activated carbon adsorption column, wash with dilute hydrochloric acid with a concentration of 0.24mol / L, and then wash with water. The activated carbon column was taken out, placed in a porcelain crucible, put into a muffle furnace, and fired at 750°C for 3 hours. After taking out and cooling, moisten the residue with a small amount of water, add 5mL of aqua regia, dissolve on an electric furnace at 170°C, transfer the solution into a beaker, add 3 drops of saturated sodium chloride solution, evaporate to nearly dry ...

Embodiment 3

[0037] Accurately weigh 21.1687g of sample 3# into a porcelain boat, place the porcelain boat in a muffle furnace, heat up to 750°C, burn for 5 hours, transfer the sample into a 250mL beaker after cooling, add 40mL of concentrated hydrochloric acid, 8mL of hydrogen peroxide ( Concentration is 30%), heated and melted on electric furnace for 40 minutes. Add water to dilute to 110mL, boil on an electric furnace, cool to 40-50°C, filter with Buchner funnel equipped with activated carbon adsorption column, wash with dilute hydrochloric acid with a concentration of 0.24mol / L, and then wash with water. The activated carbon column was taken out, placed in a porcelain crucible, and the porcelain crucible was put into a muffle furnace, and fired at 740° C. for 4 hours. After taking out and cooling, moisten the residue with a small amount of water, add 5mL of aqua regia, dissolve it on an electric furnace at 180°C, transfer the solution into a beaker, add 2 drops of saturated sodium chlo...

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Abstract

The invention discloses a continuous testing method for platinum and palladium in ore. The continuous testing method comprises the following steps: (1) weighing an ore sample, firing, cooling, adding concentrated hydrochloric acid and hydrogen peroxide into the sample, and performing heating dissolution; (2) diluting with water, boiling, cooling, filtering, and adsorbing filtrate with activated carbon; (3) firing the activated carbon after adsorption, cooling, dissolving with chloroazotic acid, adding a saturated sodium chloride solution into the solution, performing distillation drying, adding hydrochloric acid and a small amount of water, performing heating dissolution on salts, filtering, putting filtrate into a colorimetric tube, and fixing the volume of the filtrate; (4) adding phosphoric acid and 5-Cl-PADAB into the obtained solution, developing at room temperature, testing the light absorbency at a wavelength of 555-557nm, and calculating the content of palladium in the sample; (5) adding the phosphoric acid and the 5-Cl-PADAB into the solution obtained in the step (3), heating in a boiling water bath, testing the light absorbency and the total amount of platinum and palladium at a wavelength of 565-567nm, and calculating the content of platinum in the sample by using a minusing method. The continuous testing method is simple, convenient and rapid, good in environmental-friendliness and good in accuracy and precision.

Description

technical field [0001] The invention relates to a method for continuous determination of platinum and palladium in ores, in particular to a method for separating and enriching platinum and palladium with active carbon and continuously measuring platinum and palladium with spectrophotometry. Background technique [0002] The content of platinum and palladium in ores is generally determined by petroleum ether-chloroform extraction spectrophotometry, which is based on the fact that platinum (IV) is reduced to platinum (II) in the presence of stannous chloride, and didodecyl di Thiooxalamide (DDO) forms a fuchsia complex, which is extracted with a petroleum ether-chloroform mixed solvent to determine platinum; in a 8mol / L hydrochloric acid solution and a water bath at 50°C, palladium (II) and DDO form a yellow color The complex was extracted with petroleum ether-chloroform mixed solvent to determine palladium. This method needs to complete two extraction processes for the deter...

Claims

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Application Information

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IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 屈伟周成英刘爽
Owner 有研科技集团有限公司
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